How do I remove a repository of yum

Solution 1:

All the yum repos located at /etc/yum.repos.d/. So, you can remove a repo with:

# rm -f /etc/yum.repos.d/c6-media.repo

Or temporary disable it with:

# yum --disablerepo=c6-media search ...

(Change enabled=1 to enabled=0 in c6-media.repo for permanent)

Solution 2:

New in 6.0 or 6.1 (can't remember which off hand) is yum-config-manager, which you can use to disable a repo.:

yum-config-manager --disable c6-media